21111092 has 6 divisors (see below), whose sum is σ = 36944418. Its totient is φ = 10555544.

The previous prime is 21111073. The next prime is 21111113. The reversal of 21111092 is 29011112.

It can be written as a sum of positive squares in only one way, i.e., 13734436 + 7376656 = 3706^2 + 2716^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21111092.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2638883 + ... + 2638890.

It is an arithmetic number, because the mean of its divisors is an integer number (6157403).

Almost surely, 2^21111092 is an apocalyptic number.

It is an amenable number.

21111092 is a deficient number, since it is larger than the sum of its proper divisors (15833326).

21111092 is a wasteful number, since it uses less digits than its factorization.

21111092 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5277777 (or 5277775 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 17.

The square root of 21111092 is about 4594.6808376644. The cubic root of 21111092 is about 276.3780613300.

The spelling of 21111092 in words is "twenty-one million, one hundred eleven thousand, ninety-two".